Screw-threading machine



(No Model.)

SCREW THREADING MACHINE.

Patented May 5, 1885.

Fig.1;

WITNESSES INVENTOR:

ATTORNEYS.

lhvrrnn STATES ATENT Orrro's.

CHARLES E. COE, F LEESBURG, KANSAS, ASSIGNOR, BY DIRECT AND MESN EASSIGNMENTS, OF TWO-THIRDS TO LEONARD G. FATH, AMOS SAYVYER, AND EDIVARDL. VVAGGONER, ALL OF HILLSBOROUGH, ILLINOIS.

SCREW-TH READING MACHINE.

SPECIFICATION forming part of Letters Patent No. 317,303, dated May 5,1885,

Application filed January 520, 1855.

To all whom it may concern:

Be it known that I, CHARLES E. Con, a citizen of the United States,residing at Leesburg, in the county of Staiford and State of Kansas,have invented certain new and useful Improvements in Screw-ThreadingMachines, of which the following is a description.

This invention relates to that class of devices which are intended toturn and square upshoulders and to out new screw-threads by hand tosupply the place of old screwthreads which have become worn in use, andits object is particularly to form new screw- 5 ends on carriage-axlesand to extend the screw thread farther onto pipes, bolts, &c.

To this end my invention consists in the construction and combination ofparts forming a machine for turning metals and cutting screw-threadsthereon by hand, hereinat'ter described and claimed, reference being hadto the accompanying drawings, in which- Figure 1 is a side elevation ofmy invention, partly broken away to show the inner parts. Fig. 2 is afront end view of the same. Fig. 3 is a view of the same end with thefront plate removed, and Fig. 4c is a central longitudinal verticalsection of the invention in full.

A represents a hollow sleeve of sufficient internal diameter to receiveany axle, O, or pipe which it is to act upon.

B represents a series of screws entering the sleeve radially at each endthereof, by means ofwhich the sleeve is trued into line with the axle Oor other work, and then bound tightly thereon. The exterior of thesleeve is turned cylindrical,and the forward end thereof is providedwith a flange, D, which is cut away at three places to admit three ofthe adj ustingscrews B.

E is a ring fitted neatly to turn upon the sleeve, and provided witharms F, extending 5 forward over the flange D, to serve assecuring-points to the front plate, G, which is se- (N'o model.)

cured to the arms by means of bolts or rivets H. On its inner face theplate G is grooved radially to receive cutting-tools J K, one of whichmay be a squaring-up tool and the other a screw-threading. to'ol.

Each tool to be used in this machine has a screw-threaded hole in itsshank to receive a bolt, L, which passes through a slot in the plate G,whereby endwise motion is permitted to the tool for the purpose ofadjusting it to the size of the work it is to make, and whereby the toolmay be rigidly fixed in the plate when it is set, as desired.

M is a screw in the flange D to act against the plane end of the ring E,and provided with a star feed-wheel, N, which engages a fixed spur, 0,whereby the ring and its attachments are fed along upon the sleeve alittle at each revolution of the ring. 6

P is a crank, by which the ring is revolved.

Q is a leader, having a curved edge at its inner end to engage the oldthread on the work, thereby guiding a threading-tool fixed to the plateto extend the old thread along the work or to clear out the old thread.

In operation it is usually necessary to turn the axle-sh0ulder fartherback. This is done with a squaring-up tool or any other shaped pointdesired, using the star feed screw. Then the leader Q and thethreading-tool are set to engage the thread at different points, and thestar feed-screw is removed. Now, byturning the crank, the oldscrew-thread may be trued out to a full thread, or the thread may beextended along the axle as far as the axle has been turned to the sizeof the screw. The leader Q is slotted to receive a screw-bolt, wherebyit may be first set and then bound to the plate G.

What I claim as my invention, and desire to secure by Letters Patent,isg 1. The combination of the sleeve A, provided with the flange D, theradial adjusting-screws B, the ring E, provided with arms 0 F, theradially slotted and grooved plate G,

secured to the arms F, a turning-tool scour able to the plate, the crankP, the feed-screw ing-tool fitted to plate G, and the leader Q, M,provided with a star-wheel, N, and the shaped to engage a screw-threadand slotted 1o spur O, substantially as shown and described.foradjustment, substantially as shown and 2. The combination of thesleeve A, pro- I described. 5 Vided with the flange D, the radialadjusting- CHARLES E. COE.

screws B, the ring E, provided with arms F, WVitnesses:

the radially slotted and grooved plate G, se- I ZACH SHRoP, cured to thearms F, the crank P, a thread JOHN M. WALKER. J

